fix some warnings

@@ -846,7 +846,7 @@
 		29B97313FDCFA39411CA2CEA /* Project object */ = {
 			isa = PBXProject;
 			attributes = {
-				LastUpgradeCheck = 0500;
+				LastUpgradeCheck = 0710;
 			};
 			buildConfigurationList = C01FCF4E08A954540054247B /* Build configuration list for PBXProject "MapView" */;
 			compatibilityVersion = "Xcode 3.2";
@@ -1056,22 +1056,26 @@
 		C01FCF4F08A954540054247B /* Debug */ = {
 			isa = XCBuildConfiguration;
 			buildSettings = {
-				ARCHS = "$(ARCHS_STANDARD_INCLUDING_64_BIT)";
 				CLANG_WARN_BOOL_CONVERSION = YES;
 				CLANG_WARN_CONSTANT_CONVERSION = YES;
 				CLANG_WARN_EMPTY_BODY = YES;
 				CLANG_WARN_ENUM_CONVERSION = YES;
 				CLANG_WARN_INT_CONVERSION = YES;
+				CLANG_WARN_UNREACHABLE_CODE = YES;
 				CLANG_WARN__DUPLICATE_METHOD_MATCH = YES;
 				"CODE_SIGN_IDENTITY[sdk=iphoneos*]" = "iPhone Developer";
 				COPY_PHASE_STRIP = NO;
 				DEPLOYMENT_POSTPROCESSING = NO;
+				ENABLE_STRICT_OBJC_MSGSEND = YES;
+				ENABLE_TESTABILITY = YES;
 				GCC_C_LANGUAGE_STANDARD = c99;
 				GCC_FAST_MATH = YES;
+				GCC_NO_COMMON_BLOCKS = YES;
 				GCC_OPTIMIZATION_LEVEL = 0;
 				GCC_STRICT_ALIASING = YES;
 				GCC_THUMB_SUPPORT = NO;
 				GCC_VERSION = com.apple.compilers.llvm.clang.1_0;
+				GCC_WARN_64_TO_32_BIT_CONVERSION = YES;
 				GCC_WARN_ABOUT_MISSING_NEWLINE = YES;
 				GCC_WARN_ABOUT_MISSING_PROTOTYPES = NO;
 				GCC_WARN_ABOUT_RETURN_TYPE = YES;
@@ -1079,7 +1083,7 @@
 				GCC_WARN_UNINITIALIZED_AUTOS = YES;
 				GCC_WARN_UNUSED_FUNCTION = YES;
 				GCC_WARN_UNUSED_VARIABLE = YES;
-				IPHONEOS_DEPLOYMENT_TARGET = 5.0;
+				IPHONEOS_DEPLOYMENT_TARGET = 8.0;
 				ONLY_ACTIVE_ARCH = YES;
 				OTHER_LDFLAGS = "";
 				RUN_CLANG_STATIC_ANALYZER = NO;
@@ -1094,21 +1098,24 @@
 		C01FCF5008A954540054247B /* Release */ = {
 			isa = XCBuildConfiguration;
 			buildSettings = {
-				ARCHS = "$(ARCHS_STANDARD_INCLUDING_64_BIT)";
 				CLANG_WARN_BOOL_CONVERSION = YES;
 				CLANG_WARN_CONSTANT_CONVERSION = YES;
 				CLANG_WARN_EMPTY_BODY = YES;
 				CLANG_WARN_ENUM_CONVERSION = YES;
 				CLANG_WARN_INT_CONVERSION = YES;
+				CLANG_WARN_UNREACHABLE_CODE = YES;
 				CLANG_WARN__DUPLICATE_METHOD_MATCH = YES;
 				"CODE_SIGN_IDENTITY[sdk=iphoneos*]" = "iPhone Distribution";
 				COPY_PHASE_STRIP = YES;
 				DEPLOYMENT_POSTPROCESSING = NO;
+				ENABLE_STRICT_OBJC_MSGSEND = YES;
 				GCC_C_LANGUAGE_STANDARD = c99;
 				GCC_FAST_MATH = YES;
+				GCC_NO_COMMON_BLOCKS = YES;
 				GCC_STRICT_ALIASING = YES;
 				GCC_THUMB_SUPPORT = NO;
 				GCC_VERSION = com.apple.compilers.llvm.clang.1_0;
+				GCC_WARN_64_TO_32_BIT_CONVERSION = YES;
 				GCC_WARN_ABOUT_MISSING_NEWLINE = YES;
 				GCC_WARN_ABOUT_MISSING_PROTOTYPES = NO;
 				GCC_WARN_ABOUT_RETURN_TYPE = YES;
@@ -1116,7 +1123,7 @@
 				GCC_WARN_UNINITIALIZED_AUTOS = YES;
 				GCC_WARN_UNUSED_FUNCTION = YES;
 				GCC_WARN_UNUSED_VARIABLE = YES;
-				IPHONEOS_DEPLOYMENT_TARGET = 5.0;
+				IPHONEOS_DEPLOYMENT_TARGET = 8.0;
 				OTHER_LDFLAGS = "";
 				RUN_CLANG_STATIC_ANALYZER = NO;
 				SDKROOT = iphoneos;